Title :
2-D vector quantized behavioral model for wireless transmitters’ nonlinearity and memory effects modeling
Author :
Hammi, Oualid ; Ghannouchi, Fadhel M. ; Vassilakis, Bill
Author_Institution :
Univ. of Calgary, Calgary
Abstract :
This paper presents a two-dimensional lookup table model suitable for nonlinearity modeling in wireless transmitters exhibiting memory effects. The model is directly derived from the raw measured input and output waveforms of the device under test without additional intermediate signal processing. The model is validated on a 3G LDMOS based power amplifier driven by multi-carrier WCDMA signal. In the proposed model, the major limitation of table based models that is related to the length of the waveform used for the identification is alleviated by the use of an interpolation algorithm.
Keywords :
code division multiple access; interpolation; power amplifiers; radio transmitters; vector quantisation; 2D vector quantized behavioral model; 3G LDMOS; interpolation algorithm; memory effect; multicarrier WCDMA signal; power amplifier; two-dimensional lookup table model; wireless transmitter nonlinearity; Interpolation; Power amplifiers; Power system modeling; Predictive models; Radio frequency; Radiofrequency amplifiers; Signal processing algorithms; Table lookup; Testing; Transmitters; 3G; distortion; look-up table; memory effects; nonlinearity; power amplifier;
Conference_Titel :
Radio and Wireless Symposium, 2008 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4244-1462-8
Electronic_ISBN :
978-1-4244-1463-5
DOI :
10.1109/RWS.2008.4463604
